Hello Frédéric ! Thank you so much for replying my questions. 1) Yes '353.9(469)(094.4)' is supposed to be an authority that was just an example - 'Wilkens, H. J.' is another example. I think they are properly indexed as I can search for those exact terms and the results are returned in the intra interface. 2) Picking up on your comment on having a malformed biblio record, I had indeed some very incomplete records with no 6XX or 7XX in them, consequently no authorities to link and I thought that may be causing the behaviour. However, on a different import with all the records having authority info to link from, the same error is occurring. I think I might have figured part of the reason for 1) to be happening. In https://github.com/fredericd/Koha-Contrib-Tamil/blob/master/lib/Koha/Contrib... Some characters, namely ',', are being stripped from the value and the authorities are being saved without the ',' character. Upon running the link task, ',' is still present in the biblios so the match fails. Does that make sense? Anyway, I think that's only part of the reason because there are some other authorities throwing not found warnings without any of those chars special chars. Yet another possible reason could be encoding causing the match to fail, for example 'Ossian, Séc. 3'. Another (probably) important piece of information is I have a UNIMARC installation, is there some particular (indexing) configuration required? Please let me know if any of this makes sense. Thank you, Pedro Amorim 2016-08-13 6:55 GMT+00:00 Frédéric Demians <f.demians@tamil.fr>:

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1) For many biblios, the following message is presented: WARNING: authority not found -- 353.9(469)(094.4)

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But said authority indeed exists and is indexed.

Is '353.9(469)(094.4)' supposed to be an authority? If it's not found, it means it isn't properly indexed.

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2) After about 400 biblios processed (I think), it throws this error and it hangs printing "405" forever:

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*** unhandled exception in callback: *** Quantifier follows nothing in regex; marked by <-- HERE in m/* <-- HERE / at /usr/local/share/perl/5.14.2/Koha/Contrib/Tamil/Authority/Li

nkBiblioTask.pm

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line 77.

You must have a malformed biblio record.

Kind regards, -- Frédéric DEMIANS http://www.tamil.fr/fdemians